Brush.



T. F. BARRY.

BRUSH. APPLICATION men ma. w. 1914.-

Patented S, 1915.

351, in; ma

THOMAS F. BARRY, F NEWARK, NEW

To' aZZ whom it may concern ygB'eit known that I, THOMAS F. BARRY, a

citizen of the United States, and a resident ofF-Newark, in the county of Essex and State nd useful Improvements in Brushes, of vhich the following-is a specification.

lirushesgand the object'of 'the invention is to reduce a brush of superiorcharacter both Qflness-inits main portion than the depth of main portion to closely enter said recess, said- ,,.pla te having along its lower side edges a surrounding 'r m'toengage the lower outer ].,ed ,eszof the-back and being not only of Icient thickness to fill 'the'recess inthe special holes formed therein to receive the ripper or knot ends of the individual tufts f; bristl es,\and heads of vulcanized rubber :the tuftsatogetherand the tufts Within ,the' holesin'said plate. Each tuft is, prior 1 was introduction to the '4 .jtirelyv completed with its knot end carrying a head, of vulcanized rubber to hold the "stles together, andafter all of the tufts auebeenapplied to the plate, a very th n ,la' e1 ofcelluloid cement or a very thin i veneerlof celluloid is applied upon the upper facets said plate and the upper ends of ,heads of vulcanized hard rubber on the rifts, and in this way the plate and all of c "ftheft' ufts, become fastened together. and the Q fliead"comprising the plate and tuft-s may han be readily handled and applied to'the iece X ithin the back of the brush.

I p; csent my invention herein as embodied a'tooth brush having an integral back and fhandlemade of celluloid and a tuft orbristle ica'rrying plate made of like'material. I do fndt'howcver desire to limit my invention to its fciiibodinient intooth brushes, since I am I .'aware' that brushes for varying purposes maybeinade in accordance therewith. 1

' STATES PATiE i JERSEY, ASSIGNOR. TO RUBBER-8c CELLULOID OF NEWARK, NEW JERSEY, A CORPORATIGINT OF Specification of Letters Patent. Application filed February 17, 1914. Serial No. 819,166. I 1

iofoNew Jersey, have invented certain new :he invention relates to improvements in,

t the matter of general durability and of so The-brush of my invention comprises.

clg but of requisite thickness to have n saidi ends, said heads holding the bristles aforesaid plate, en-

ori ice.

Patented The invention will'be fully understood from 'the. detailed descriptionherein'after presented, reference being had conipanying drawings, in which:

Figure 1 is a side elevation,'part in sec-' tion, of thc back and tuft-carrying plate 'slightly separated from each other and ready for application one to the other in completing the brush; Fig; 2 is a detached bottom view of the back and handle of-the brush; FM. 3 is a top view of the tuftcarrying p late or brush head, with the ,tufts held thereby; Fig. 4 is a corresponding View pf the same with the tufts omitted from the "perforations or holes in saidplate; Fig. 5

is an enlarged centrahlongitudinal section brush back and tuft-carrying" through the plate with the tufts therein, the whole being assembled and secured together by 'celiuloid cement applied at the meeting surfaces of said back and plate, the handle of the brush being partly broken away; Fig. 6is a' transverse se'ctio'nof the line 66 of Fig. 5 illustrate suitable same on the dotted means for forming "the u ie, 1-915.

; Figs. 7 to 10 inclusive to the ac.- '7

tufts and vulcanizing rubber on the ends.

thereof for securing together, Fig. 7 being a sideelevatiompartly the bristles of each tuft broken awa y and partly in section-, of-a base bloclg nold-plate thereon and bristlesin said block and plate, this figure representing onestep of'the process of manufacturingthe:

tufts; Fig. 8 a top View of the same and indicating by the dotted 'line 77 the'section on which Fig. 7 is taken; Fig. 9 is asideelevation, partly broken away, showing the base block, mold plate'and bristles after the whole structure has been invertedfrom the position shown in Fig. 7 and the then lower extremities of the tufts have been dipped into a rubber solution, and Fig. 10 a side elevation, in section, showing thefbase-block and moldplate spaced apart and said platewith the rubber'on the ends of the tufts of bristles inclosed therein, placed on a vulcanizing table, and Fig. view on an enlarged-scale of one of the completed tufts.

In the drawings, referring to Figs. 1. to 6 inclusive, and Fig. 11, 15 denotes the back of. the brush having a recess 16 'therein, 17 the plate adapted to said recess and formed with a series. of-*vertical holes or pefir'ora-- tions 18 therein, and 19 the tufts whose up- 110 partly broken away and partly 11 is a detached perspective 7 per ends are held within said holes of perforations 18. Preferablythe back 15 will be formed with a suitablehandle 20, and said back and handle Wlll preferably be molded in one integral piee of celluloid or other pyroxylin material. The plate 17 will also preferably be in one integral piece of celluloid or other pyroxylin material, and the holes 18 in said plate 17 are conical at their upper ends and at their lower portions have parallel walls, as more clearly represented in Figs.- 5 and 6. The plate 17 has a comparatively thick body portion 21 adapted to the recess 16 in the back, and this body portion is surrounded by a laterally projecting flange 22 which engages the face surfaces 25of the back 15 surrounding the recess 16 therein.

The tufts 19 are each independently formed to completion and then applied to the plate 17. The tufts 19 are of special character in that they are independently formed and that the bristles thereof. are held together at the knot end of the tuft by the head 23 of vulcanized h ard rubber,'said head 23 preferably being conical in outline or having downwardly converging side walls and a flat uppel-end. The heads 23 conform to the outline of the upper portions of the holes or perforations 18 in the plate 17 and snugly fit within the same, the upper flat ends of the heads 23 being on a level with the upper flat face of said plate. One purpose'of providing the plate 17 with the thick bodytportion 21 is to make provision for the holes or perforations 18 of the character shown adapted to receive the upper ends of the tufts of bristles with the vulcanized heads 23 thereon, said heads fitting the upper enlarged portions of said holes or perforations and the tufts just below said heads closely fitting within the lower contracted ends of said holes or perforations.

In the manufacture of the brush I first make the individual tufts and then insert said tufts downwardly through the holes or perforations 18 in the plate 17, pressing said tufts through said holes or perforations untilthe upper ends of the heads 23' are on a level with the upper surface of said plate 17 and thereupon I apply a very thin layer of celluloid cement or secure a very thin veneer of celluloid over the top of the body portion 21 of the plate 17 and over the upper ends of the heads 23, as I indicate at 24. this thin layer of cement or thin veneer of celluloid serving to hold the tufts in the plate 17 and also tobind the'tufts in said" plate to a suflicient extent to permit the plate to be readily handled in making up the brushes without the tufts becoming irregu- -lar or slipping therefmm.

I regard the employment of the thin layer of celluloid cement or of celluloid 24 of convertical sides of the body portion 21 thereof.

or in applying celluloid cement to the surfaces of the recess 16 in the back and the.

surrounding surface 25 of said back, and then inserting the body portion of the plate 17 within the recess 16 and pressing the flange portion 22 of said plate against the surface 25 of the back. The celluloid cement will firmly unite the plate 17 and back 15 and said plate and back will, due to the nature of the material and the cement em-- 7 ployed, become in effect one integral piece.- The body portion 21 of the plate 17 completely fills the recess 16 in the back 15, as shown in Fig. 5, and the brush, when completed, is of very durable character with the bristles firmly secured in position.

I will now describe the means for making the tufts 19. Referring'to Figs. 7 to 10 inclusive. 3O designates a base-block, 31 a mold plate thereon, and 32 bunches of bristles threaded through the registering openings or apertures 33 in said base-block. and 34 in said mold plate, the apertures 34being conical in .outline. In carrying out the process of manufacture I place the mold-plate 31 upon the block 30 with the respective o enings or apertures in said plate and bloc in register, and then thread or sift the bristles for the tufts through said openings, as

shown in Fig. 7. The securing of the bunches of bristles within the openings 33 in the block 30 and extending the bristles considerably above the plate. 31 results in the upper ends of the bunches of bristles being somewhat spread or of greater, diameter than the diameter of those portions of the bunches within the block 30. After the bristles for the series of tufts have been located in the block 30 and plate 31, said side down. as shown in Fig. 9. and the then lower ends of the bunches of bristles are dipped into a rubber solution-which will enter in between the bristles of the tufts and thoroughly coat the same and form heads of rubber thereon, as represented at the lower portion of Fig. I then'allow the rubber at the ends of the bunches of bristles or tufts, as they may now be called, to partly cure or oxidize by exposure to the air for a limited period, preferably allow block and plate are-inverted or turned uping the block, plate and bristles to stand over night preparatory to the vulcanizing of the rubber on the ends of the tufts. The

next stepin the process is to slide the mold plate 3.1 outwardly on the tufts until the outer ends of the tufts carrying the rubber are within the openings 34 in said plate, and thereupon insert spacing or distance pieces between the block and plate so as to, hold them properly apart and maintain the bunches or tufts of bristles in proper condition and relation to each other and to said block and plate. Thereafter the structure is placed upon a steam or other heated table 36, as shown in Fig. 10, the plate 31 being directly on the table and'the then lower ends of the heads of rubber on the tufts being in contact with said table. The heat of the table 36 will be .imparted to the plate 31. which is preferably of metal, and at first the heads of rubber on the ends of the tufts will become softened and conformed to the shape of the holes 34 in the plate 31, and thereafter the continued action of the heat'will result in the rubber of the heads,

becoming vulcanizedand in said heads taking the form of the holes 34 in the plate 31 and firmly binding the bristles of each tuft together. After the rubber on the ends of the tufts has become properly vulcanized,.

the block 30 may be stripped from the tufts leaving them all held by the plate 31, and the tufts may then be removed from the plate 31, and used in the manufacture of the brushes, the tufts then being complete and ready for independent insertion in the holes or perforations 18 of the plate 17. The conical holes 34 in the plate 31 serve as molds for shaping the heads 23 on the tufts. and should be of a size corresponding with the dimensions of the upper ends -of the openings or perforations 18 in the plate 17 so that when the tufts are ap plied to said plate 17 the heads 23 thereon rill snugly fit into the said holes or openings 18. The block 30 and mold plate 31 may be of considerable size. if desired. so

that several hundred tufts may be formed with the use thereof at a single-operation.

l have hereinbefore disclosed the preferred embodiment of my invention, especially with regard to tooth brushes, and also the preferred method of preparing the individual tufts for either tooth or other brushes. I prefer, for tooth mind some other brushes, to form both the back and tuft carrying plate of plastic material. since when said tWo parts thus formed are united they become substantially one integral. whole and a very desirable brush, for many reasons,

results. I do-not wish, however, to limit my invention, as claimed, to the specific details hereinbefore described further than the invention. and claims may require.

What I claim as my invention and desire to secure by Letters Patent, is:

1. A brush comprising a back and a hen dle integral therewith of .pyroxylin mate.

rial, said back having on its lower side a reccss conforming generally to the outline of the back, a plate of pyroxylin material having a body portion substantially filling said recess and a. lower lateral flange united to the lower surface of said back surrounding the said recess, and said plate also having a series of vertical holes enlarged at their upper ends, and a series of tufts of bristles in the holes in said plate, said tufts each having independently thereon a head of heat vulcanized rubber holding the bristles of the tuft together and confined Within a hole in their upper ends, and a series of tufts of bristles in the holes in said plate, said tufts each having independently thereon a head of vulcanized rubber holding the bristles of the tuft together and confined within the hole in said plate, and said plate having on its upper surface a thin layer of material binding the tuftsin the holes in said plate.

3. A brush comprising a back having in its lower side a recess conforming generally to the outline of'the back, a plate having a body portion substantially filling said recess and secured therein, and said plate also having a series of vertical holesenlarged at their upper ends, and a series of tufts of bristles in the holes in said plate, said tufts each having independently thereon a head of cementitious material holding the bristles of the tuft together and confined within a 'hole in said plate, and said plate having on its upper surface a thin coating of cementitious material binding the tufts in the holes in said plate.

Signed at Newark, in the county of Essex, and State 'of New Jersey, this 16th day of February, A. D. 1914.

.A. MILLS CAaswnLL, ARTHUR MARION. 

